Endoscopic clip applier

ABSTRACT

An endoscopic surgical clip applier is provided, wherein a distal end of the surgical clip applier is introduced to a target surgical site through a cannula having a fixed diameter lumen. The surgical clip applier comprises an endoscopic portion supported by and extending from a handle assembly, and a pair of jaws supported at a distal end of an outer tube, wherein the pair of jaws are movable between a fully open condition and approximated conditions. When the pair of jaws are in the fully open condition the pair of jaws extend radially beyond an outer diameter of the outer tube to a dimension greater than the fixed diameter of the lumen of the cannula; and when the pair of jaws are in at least one approximated condition the pair of jaws have a transverse dimension permitting passage through the lumen of the cannula.

CROSS REFERENCE TO RELATED APPLICATION

The present application claims the benefit of and priority to U.S. Provisional Application Ser. No. 61/653,593, filed on May 31, 2012, the entire contents of which are incorporated herein by reference.

BACKGROUND

1. Technical Description

The present disclosure relates to surgical clip appliers and, more particularly, to surgical clip appliers including a constant engagement wedge plate and independent manual release.

2. Background of Related Art

Laparoscopic procedures are performed in the interior of the abdomen. These procedures are through a small incision and through a narrow endoscopic tube or cannula inserted through a small entrance incision in the skin. Meanwhile, minimally invasive procedures performed elsewhere in the body are often generally referred to as “endoscopic” procedures. A surgeon will typically insert and extend a tube or cannula device into the body through the entrance incision to provide an access port. This port allows insertion of various surgical instruments therethrough, including endoscopic surgical clip applier.

These instruments are used for performing surgical procedures on organs, blood vessels, ducts, or body tissue far removed from the incision. Often during these procedures, it is necessary to apply hemostatic clips to blood vessels or various ducts to prevent the flow of body fluids therethrough during the procedure. Many different hemostatic clips having different geometries may be used and all are within the scope of the present disclosure.

One advantage of minimally invasive surgical procedures is the reduction of trauma to the patient as a result of accessing internal organs through smaller incisions. Known endoscopic clip appliers have greatly facilitated the advent of more advanced minimally invasive procedures by permitting a number of clip applications during a single entry into the body cavity. Commercially available endoscopic clip appliers are generally of 10 mm outer diameter and are adapted to be introduced through a 10 mm cannula. Other commercially available endoscopic clip appliers may also be generally have a 5 mm outer diameter and are adapted to be introduced through a 5 mm cannula.

In order for a 5 mm clip applier to be able to pass through a 5 mm cannula, it may be necessary for the jaws of the clip applier to deflect closed or be held in a closed state during insertion. However, following insertion, it is desirable for the jaws of the 5 mm clip applier to return to a fully opened condition and, preferably be held in the fully open condition, during manipulation in the anatomical cavity, so that the jaws may retain their alignment with one another and so that the jaws may proper receive a surgical clip therein for formation, as needed.

Accordingly, a need exists for a surgical clip applier including a mechanism for supporting the pair of jaws at substantially all times except during an insertion/retraction of the surgical clip applier to the anatomical cavity, and during a firing of the surgical clip applier.

Accordingly, a need also exists for a surgical clip applier including a pair of jaws that may be held in a fully open condition, during manipulation in the anatomical cavity, and which may be selectively approximated for insertion through a 5 mm cannula.

SUMMARY

According to the present disclosure, a surgical clip applier including a constant engagement wedge plate and independent manual release is provided.

According to an aspect of the present disclosure, an endoscopic surgical clip applier for application of surgical clips to body tissue, is provided, wherein a distal end of the surgical clip applier is introduced to a target surgical site through a cannula having a fixed diameter lumen. The surgical clip applier comprises a handle assembly including a trigger actuatable to actuate the surgical clip applier; and an endoscopic portion supported by and extending from the handle assembly. The endoscopic portion includes an outer tube having a diameter dimensioned for passage through the lumen of the cannula; a pair of jaws supported at a distal end of the outer tube, wherein the pair of jaws are movable between a fully open condition and approximated conditions, wherein when the pair of jaws are in the fully open condition the pair of jaws extend radially beyond an outer diameter of the outer tube to a dimension greater than the fixed diameter of the lumen of the cannula; and when the pair of jaws are in at least one approximated condition the pair of jaws have a transverse dimension permitting passage through the lumen of the cannula.

The endoscopic portion also includes a wedge plate slidably disposed within the endoscopic portion, the wedge plate defining a nose at a distal end thereof. The wedge plate is movable between a distal-most position wherein the nose is interposed between the pair of jaws to maintain the pair of jaws in the fully open condition; and at least one proximal position wherein the nose is at least partially withdrawn from between the pair of jaws to permit the pair of jaws to be placed in the at least one approximated condition.

The surgical clip also includes a release mechanism connected to the wedge plate. In use, an actuation of the release mechanism withdraws the nose of the wedge plate from between the pair of jaws. Also in use, an actuation of the trigger withdraws the nose from between the pair of jaws.

According to another aspect of the present disclosure, an endoscopic surgical clip applier for application of surgical clips to body tissue, is provided, wherein a distal end of the surgical clip applier is introduced to a target surgical site through a cannula having a fixed diameter lumen. The surgical clip applier comprises a handle assembly including a trigger, the trigger being actuatable to actuate the surgical clip applier; and an endoscopic portion supported by and extending from the handle assembly.

The endoscopic portion includes an outer tube having a diameter dimensioned for passage through the lumen of the cannula; and a pair of jaws supported at a distal end of the outer tube, wherein the pair of jaws is movable between a fully open condition and approximated conditions. Wherein when the pair of jaws are in the fully open condition the pair of jaws extend radially beyond an outer diameter of the outer tube to a dimension greater than the fixed diameter of the lumen of the cannula; and when the pair of jaws are in at least one approximated condition the pair of jaws have a transverse dimension at least less than the fixed diameter of the lumen of the cannula. The endoscopic portion also includes a wedge plate slidably disposed within at least the endoscopic portion, wherein the wedge plate defines a distal end. The wedge plate is movable between a distal-most position wherein the distal end of the wedge plate is interposed between the pair of jaws to maintain the pair of jaws in the fully open condition; and at least one proximal position wherein the distal end of the wedge plate is at least partially withdrawn from between the pair of jaws to permit the pair of jaws to be placed in at least a partially approximated condition.

The surgical clip applier further includes a release mechanism connected to the wedge plate. In use, an actuation of the release mechanism withdraws the distal end of the wedge plate from between the pair of jaws. Also in use, an actuation of the trigger withdraws the distal end of the wedge plate from between the pair of jaws.

The release mechanism may include a biasing member for urging the wedge plate to the distal-most position. The biasing member may be connected to at least the wedge plate.

The release mechanism may include an inner tube slidably disposed within the outer tube, wherein the inner tube includes a distal end coupled to the wedge plate.

A proximal end of the inner tube may extend into the handle assembly. The release mechanism may include at least one release pin extending from the proximal end of the inner tube through a respective slot defined in the handle assembly.

The wedge plate may be in the distal-most position when the trigger is in an un-actuated condition.

The wedge plate may be in the distal-most position when the trigger and the release mechanism are both in an un-actuate condition.

The wedge plate may be at least partially withdrawn when the trigger is at least partially actuated.

The withdrawal of the wedge plate by the trigger may be independent of the withdrawal of the wedge plate by the release mechanism.

The surgical clip applier may further comprises at least one surgical clip loaded therein.

The surgical clip applier may further comprise a clip pusher configured to individually distally advance a surgical clip to the pair of jaws while the pair of jaws are in the open condition.

The surgical clip applier may further include a jaw closure member positioned adjacent the pair of jaws to move the pair of jaws to an approximated position upon an actuation of the trigger.

BRIEF DESCRIPTION OF THE DRAWINGS

The present clip applier will be more fully appreciated as the same becomes better understood from the following detailed description when considered in connection with the following drawings, in which:

FIG. 1 is a distal, right side, perspective view of a surgical clip applier according to an embodiment of the present disclosure, shown in a first condition;

FIG. 2 is a proximal, left side, perspective view of the surgical clip applier of FIG. 1;

FIG. 3 is an enlarged view of the indicated area of detail of FIG. 1;

FIG. 4 is a perspective view, with parts separated, of components of an endoscopic portion and a manual release mechanism of the surgical clip applier of FIGS. 1-3;

FIG. 5 is an enlarged perspective view of the indicated area of detail of FIG. 4;

FIG. 6 is an enlarged perspective view illustrating a connection between a distal end of a manual release mechanism and a proximal end of a wedge plate;

FIG. 7 is a perspective view of a proximal end of the release mechanism illustrated in FIG. 4;

FIG. 8 is a perspective view of a distal end of the release mechanism illustrated in FIG. 4;

FIG. 9 is a bottom, plan view of a pair of jaws of the surgical clip applier of FIGS. 1-3, shown in a first condition, illustrating the pair of jaws having a transverse dimension that is greater than a transverse dimension of a lumen of a cannula, thereby preventing entrance of the pair of jaws;

FIG. 10 is a bottom, perspective view of the pair of jaws of FIG. 9;

FIG. 11 is a distal, right side, perspective view of the surgical clip applier of FIGS. 1-3, shown in a second condition;

FIG. 12 is a proximal, left side, perspective view of the surgical clip applier of FIG. 11;

FIG. 13 is a top, plan view of a pair of jaws of the surgical clip applier of FIGS. 1-3, shown in a second condition, illustrating the pair of jaws having a transverse dimension that is less than a transverse dimension of the lumen of the cannula, thereby permitting entrance of the pair of jaws;

FIG. 14 is a top, perspective view of the pair of jaws of FIG. 13; and

FIG. 15 is a bottom, perspective view of the pair of jaws of FIGS. 13 and 14.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Embodiments of surgical clip appliers in accordance with the present disclosure will now be described in detail with reference to the drawing figures wherein like reference numerals identify similar or identical structural elements. As shown in the drawings and described throughout the following description, as is traditional when referring to relative positioning on a surgical instrument, the term “proximal” refers to the end of the apparatus which is closer to the user and the term “distal” refers to the end of the apparatus which is further away from the user.

Referring now to FIGS. 1-3, a surgical clip applier, in accordance with an embodiment of the present disclosure, is generally designated with numeral 10. Surgical clip applier 10 includes a handle assembly 12 and an endoscopic portion 14 supported by and extending distally from handle assembly 12. Handle assembly 12 is made from a thermoplastic material and the elongated member is made from a biocompatible material (e.g., a stainless steel or a titanium material or alloy).

Handle assembly 12 of clip applier 10 includes a fixed handle 12 a and a trigger 12 b operatively connected to fixed handle 12 a.

Endoscopic portion 14 of clip applier 10 includes an elongated tubular member 15, supported by and extending from handle assembly 12, and a pair of jaws 16 mounted on a distal end of tubular member 15. The pair of jaws 16 are formed from a suitable biocompatible material, such as, for example, stainless steel, titanium or a suitable alloy. In use, complete actuation and release of trigger 12 b results in a complete closing and opening of the pair of jaws 16.

The pair of jaws 16 includes a first jaw member 16 a and a second jaw member 16 b disposed in juxtaposed, planar relation to one another. Each jaw member 16 a, 16 b defines a respective clip channel 17 a, 17 b formed in opposed surfaces thereof for receiving an unformed surgical clip “C” therein, and for retaining the surgical clip “C” during an approximation or closing of the jaw members 16 a, 16 b to form the surgical clip “C”.

Endoscopic portion 14 of clip applier 10 includes a rotation knob 20. Knob 20 is rotatably mounted on a distal end of handle assembly 12 and is connected to the elongated tubular member 15 to provide a three hundred sixty degree (360°) rotation of the elongated tubular member 15 and the pair of jaws 16 thereon relative to a longitudinal center axis of endoscopic portion 14.

Endoscopic portion 14 of clip applier 10 includes a clip pusher feed bar 40 for feeding and/or advancing individual surgical clips “C” between jaw members 16 a, 16 b of the pair of jaws 16. Feed bar 40 is operatively connected to and actuatable by trigger 12 b as trigger 12 b is actuated.

Reference may be made to U.S. Pat. No. 7,819,886, the entire content of which is incorporated herein by reference, for a detailed discussion of the construction and configuration of many of the components of surgical clip applier 10, and some of the operation of said components of surgical clip applier 10.

Tubular member 15 of endoscopic portion 14 of clip applier 10 includes an outer tube 15 a configured to support the pair of jaws 16 at a distal end thereof and a number of other operative components of surgical clip applier 10. Typically, the pairs of jaws 16, when in a fully open or un-approximated condition, extend radially outward from or beyond an outer surface of the outer tube 15 a.

Outer tube 15 a defines an outer diameter that generally constitutes or defines the size of the surgical clip applier 10, e.g., 5 mm, 10 mm, etc. As mentioned above, surgical clip appliers 10 are introduced to an anatomical space via a cannula 100 (see FIGS. 9 and 13) defining a lumen 102 therethrough, wherein the lumen 102 of the cannula 100 defines an inner diameter or transverse dimension “d”. Generally, in use, the cannula 100 selected for the surgical procedure must accommodate the size (i.e., diameter) of the surgical clip applier that is to be inserted therethrough, wherein the surgical clip applier has a maximum transverse dimension or is approximately equal to, and smaller, than the inner diameter “d” of lumen 102 of cannula 100. For example, a 5 mm clip applier will typically necessitate the use of a cannula 100 having a lumen 102 of at least 5 mm.

Since the lumen 102 of the cannula 100 can only accommodate a fixed dimension, and since the pairs of jaws 16, when in a fully open or un-approximated condition, extend radially outward from or beyond an outer surface of the outer tube 15 a, to a dimension “D” (see FIG. 9), the pair of jaws 16 may deflect radially inward or may be approximated, prior to or during passage through the lumen 102 of the cannula 100, and then permitted to return to or actuated to a fully open condition after passage through the lumen 102 of the cannula 100.

Surgical clip applier 10 includes a wedge plate 60 slidably disposed within at least endoscopic portion 14 and which is actuatable, directly or indirectly, by trigger 12 b. Wedge plate 60 includes a nose 62 formed at a distal end thereof. In accordance with the present disclosure, wedge plate 60 includes a distal-most position, wherein nose 62 of wedge plate 60 is interposed between first jaw member 16 a and second jaw member 16 b of the pair of jaws 16. When in the distal-most position, as seen in FIGS. 9 and 10, wedge plate 60, and nose 62 thereof, functions to support the pair of jaws 16, to spread the pair of jaws 16 to properly receive a new or un-formed surgical clip “C” therein, and to help maintain first jaw member 16 a and second jaw member 16 b of the pair of jaws 16 in proper juxtaposed alignment with one another.

Also in accordance with the present disclosure, wedge plate 60 includes at least one proximal position, as seen in FIGS, 13-15, wherein nose 62 of wedge plate 60 is removed from between first jaw member 16 a and second jaw member 16 b of the pair of jaws 16. When in any proximal position, wedge plate 60, and nose 62 thereof, does not affect a closing of the pair of jaws 16 and thus the pair of jaws 16 is free to approximate or close to form any surgical clip “C” disposed between first jaw member 16 a and second jaw member 16 b.

In accordance with the present disclosure, when clip applier 10 is in an initial or un-actuated condition, trigger 12 b is in an initial or un-actuated condition, and wedge plate 60 is in a distal-most position such that nose 62 thereof is disposed between the pair of jaws 16 to maintain the pair of jaws 60 in a fully opened condition (see FIGS. 9 and 10). During use, as trigger 12 b is actuated from the initial or un-actuated condition, to any subsequent or actuated condition, trigger 12 b directly or indirectly causes wedge plate 60 to retract to withdraw nose 62 thereof from between first jaw member 16 a and second jaw member 16 b (see FIGS. 13-15), to allow for the pair of jaws 16 to approximate and form a surgical clip “C” disposed between first jaw member 16 a and second jaw member 16 b.

With reference back to FIGS. 9 and 10, with nose 62 of wedge plate 60 disposed between first jaw member 16 a and second jaw member 16 b, the pair of jaws 16 are maintained in a fully open or un-approximated condition. In accordance with the present disclosure, as mentioned above, when the pair of jaws 16 is in the fully open or un-approximated condition, the pair of jaws 16 project beyond or extend radially outward from an outer surface of the outer tube 15 a, to have a transverse dimension “D”.

Further, with nose 62 of wedge plate 60 withdrawn from between first jaw member 16 a and second jaw member 16 b, the pair of jaws 16 is capable of being approximated so that the first jaw member 16 a and the second jaw member 16 b do not extend radially beyond an outer bounds or exterior surface of outer tube 15 a of endoscopic portion 14 (i.e., the pair of jaws 16 has a transverse dimension “˜d” which is smaller than the outer diameter of outer tube 15 a of endoscopic portion 14 and approximately equal to, and smaller, than the inner dimension “d” of the lumen 102 of cannula 100).

In accordance with the present disclosure, as seen throughout the figures, and particularly as seen in FIGS. 1-8, 11 and 12, surgical clip applier 10 includes a manual release mechanism 70 for wedge plate 60 that is configured and adapted to withdrawn wedge plate 60, from its distal-most position, independently of any direct or indirect withdrawal of wedge plate 60 due to the actuation of trigger 12 b.

Manual release mechanism 70 includes an inner tube 72 (or rigid bar member or the like) slidably disposed within outer tube 15 a. Inner tube 72 includes a distal end 72 a disposed and extending into endoscopic portion 14, and a proximal end 72 b disposed within handle assembly 12. As seen in FIGS. 1, 2, 4 and 7, inner tube 72 includes at least one retraction pin 74 supported thereon and extending from proximal end 72 b and preferably projecting through an elongate slot 12 c defined in fixed handle 12 a. Desirably, a pair of retraction pins 74 supported on inner tube 72 and projecting through respective elongate slots 12 c of fixed handle 12 a.

As seen in FIGS. 4-6 and 8, inner tube 72 includes a lip or flange 72 c extending distally from distal end 72 a Inner tube 72 includes an attachment block 76 connected to and supported on flange 72 c.

Surgical clip applier 10 may include a link member 78 secured to wedge plate 60, wherein link member 78 provides reinforcement and support to a proximal end of wedge plate 60. Link member 78 may be configured to engage or be coupled to attachment block 76 as well. In this manner, as inner tube 72 is actuated, to move wedge plate 60, attachment block 76 acts on both wedge plate 60 and link member 78 to move wedge plate 60.

Manual release mechanism 70 may include a biasing member 80, in the form of a coil spring or the like, connected to wedge plate 60 and/or link member 78 and to a fixed structure or boss (not shown) provided in handle assembly 12 and/or endoscopic portion 14. Biasing member 80 is configured and attached in such a manner so as to draw wedge plate 60 to the distal-most position, wherein nose 62 is disposed between the pair of jaws 16, as described above, and so as to draw inner tube 72 to a distal-most position. In accordance with the present disclosure, it is further contemplated that biasing member 80 may be connected to inner tube 72 in such a manner so as to move inner tube 72 to the distal-most position, whereby wedge plate 60 is pushed by inner tube 72 to the distal-most position such that nose 62 of wedge plate 60 is disposed between the pair of jaws 16 and inner tube 72 is disposed in a distal-most position.

In operation, independent of the actuation of surgical clip applier 10 by trigger 12 b, wedge plate 60 may be actuated or moved from the distal-most position thereof to any proximal position upon the actuation of inner tube 72 from a distal-most position thereof to any proximal position thereof. In particular, with wedge plate 60 and inner tube 72 at a distal-most position (see FIGS. 1-3, 9 and 10), as seen in FIGS. 11 and 12, a user may withdraw inner tube 72 to a proximal position by moving retraction pin(s) 74 in a proximal direction relative to handle assembly 12. As inner tube 72 is moved or withdrawn in a proximal direction, inner tube 72 act on wedge plate 60 (and optionally link member 78) to move of withdraw wedge plate 60 in a proximal direction to a proximal position. As discussed above, when wedge plate 60 is moved to a proximal position, nose 62 thereof with withdrawn from between the pair of jaws 16, as seen in FIGS. 13-15, thus allowing or freeing the pair of jaws 16 to close.

Also in use, as inner tube 72 and wedge plate 60 are withdrawn, biasing member 80 is acted upon to create a potential energy therewith, such as, for example, by stretching or compressing biasing member 80.

Following withdrawal of inner tube 72 and wedge plate 60, when desired or necessary, the user may release retraction pin(s) 74, thereby permitting the potential energy of the biasing member 80 to return the biasing member 80 to its original condition (i.e., to contract or expand). As biasing member 80 returns to its original condition, biasing member 80 moves inner tube 72 and wedge plate 60 to their distal-most positions, wherein nose 62 of wedge plate 60 is re-introduced between the pair of jaws 16 so as to urge the pair of jaws 16 to their spaced apart or fully open position, as seen in FIGS, 9 and 10.

In accordance with the present disclosure, since the pair of jaws 16 extend radially outward from or beyond an outer surface of the outer tube 15 a, when in a fully open or un-approximated condition, in order to pass a distal end of surgical clip applier 10 through the fixed diameter of the lumen 102 of the cannula 100, the manual release mechanism 70 is actuated, as described above and shown in FIGS. 11 and 12, to withdraw nose 62 of wedge plate 60 from between the pair of jaws 16, as shown in FIGS. 13-15. With nose 62 of wedge plate 60 withdrawn from between the pair of jaws 16, the pair of jaws 16 are free to approximate relative to one another. In this manner, as seen in FIG. 13, as the distal end of the surgical clip applier 10 (including the pair of jaws 16) is inserted into and passed through the lumen 102 of the cannula 100, the pair of jaws 16 are acted on by an inner surface of the lumen 102 of the cannula 100, causing the pair of jaws 16 to deflect inward (toward one another by an amount sufficient for the transverse dimension of the pair of jaws 16 to be reduced by an amount sufficient to enter the fixed diameter lumen of the cannula 100) until the pair of jaws 16 completely traverse the lumen 102 of the cannula 100 and exit from a distal end of the lumen 102 of the cannula 100.

Once the pair of jaws 16 completely traverse the lumen 102 of the cannula 100 and exit from a distal end of the lumen 102 of the cannula 100, a natural resiliency of the pair of jaws 16 will tend to cause the pair of jaws 16 to at least partially spread. Additionally, following complete passage of the pair of jaws 16 beyond a distal end of the lumen 102 of the cannula 100, the user releases manual release mechanism 70, as described above, in order to re-introduce nose 62 of wedge plate 60 between the pair of jaws 16 and return the pair of jaws 16 to the fully open condition, as described above.

Thereafter, the surgical clip applier 10 may be used in a normal manner to load and form surgical clips “C” on underlying vessels by actuating and re-actuating trigger 12 b.

Also thereafter, in order to withdraw surgical clip applier 10 from within the cannula 100, following the surgical procedure or following an application of all of the surgical clips “C” loaded within the surgical clip applier 10, the manual release mechanism 70 may once again be actuated, as described above, to withdraw nose 62 of wedge plate 60 from between the pair of jaws 16, to permit and/or free the pair of jaws 16 to deflect inward for re-passage through the lumen 102 of the cannula 100.

It should be understood that the foregoing description is only illustrative of the present disclosure. Various alternatives and modifications can be devised by those skilled in the art without departing from the disclosure. Accordingly, the present disclosure is intended to embrace all such alternatives, modifications and variances. The embodiments described with reference to the attached drawing figures are presented only to demonstrate certain examples of the disclosure. Other elements, steps, methods and techniques that are insubstantially different from those described above and/or in the appended claims are also intended to be within the scope of the disclosure. 

What is claimed is:
 1. An endoscopic surgical clip applier for application of surgical clips to body tissue, wherein a distal end of the surgical clip applier is introduced to a target surgical site through a cannula having a fixed diameter lumen, the surgical clip applier comprising: a handle assembly including a trigger actuatable to actuate the surgical clip applier; an endoscopic portion supported by and extending from the handle assembly, the endoscopic portion including: an outer tube having a diameter dimensioned for passage through the lumen of the cannula; a pair of jaws supported at a distal end of the outer tube, wherein the pair of jaws are movable between a fully open condition and approximated conditions, wherein when the pair of jaws are in the fully open condition the pair of jaws extend radially beyond an outer diameter of the outer tube to a dimension greater than the fixed diameter of the lumen of the cannula; and when the pair of jaws are in at least one approximated condition the pair of jaws have a transverse dimension permitting passage through the lumen of the cannula; a wedge plate slidably disposed within the endoscopic portion, the wedge plate defining a nose at a distal end thereof, wherein the wedge plate is movable between: a distal-most position wherein the nose is interposed between the pair of jaws to maintain the pair of jaws in the fully open condition; and at least one proximal position wherein the nose is at least partially withdrawn from between the pair of jaws to permit the pair of jaws to be placed in the at least one approximated condition; and a release mechanism connected to the wedge plate, wherein an actuation of the release mechanism withdraws the nose of the wedge plate from between the pair of jaws; and wherein an actuation of the trigger withdraws the nose from between the pair of jaws.
 2. The surgical clip applier according to claim 1, wherein the release mechanism includes a biasing member for urging the wedge plate to the distal-most position.
 3. The surgical clip applier according to claim 2, wherein the biasing member is connected to at least the wedge plate.
 4. The surgical clip applier according to claim 1, wherein the release mechanism includes an inner tube slidably disposed within the outer tube, the inner tube including a distal end coupled to the wedge plate.
 5. The surgical clip applier according to claim 4, wherein a proximal end of the inner tube extends into the handle assembly, and wherein at least one release pin extends from the proximal end of the inner tube through a respective slot defined in the handle assembly.
 6. The surgical clip applier according to claim 1, wherein the wedge plate is in the distal-most position when the trigger is in an un-actuated condition.
 7. The surgical clip applier according to claim 1, wherein the wedge plate is in the distal-most position when the trigger and the release mechanism are both in an un-actuate condition.
 8. The surgical clip applier according to claim 1, wherein the wedge plate is at least partially withdrawn when the trigger is at least partially actuated.
 9. The surgical clip applier according to claim 1, wherein the withdrawal of the wedge plate by the trigger is independent of the withdrawal of the wedge plate by the release mechanism.
 10. The surgical clip applier according to claim 1, further comprising at least one surgical clip loaded therein.
 11. The surgical clip applier according to claim 10, further comprising a clip pusher configured to individually distally advance a surgical clip to the pair of jaws while the pair of jaws are in the open condition.
 12. The surgical clip applier according to claim 11, further comprising a jaw closure member positioned adjacent the pair of jaws to move the pair of jaws to an approximated position upon an actuation of the trigger.
 13. An endoscopic surgical clip applier for application of surgical clips to body tissue, wherein a distal end of the surgical clip applier is introduced to a target surgical site through a cannula having a fixed diameter lumen, the surgical clip applier comprising: a handle assembly including a trigger, the trigger being actuatable to actuate the surgical clip applier; an endoscopic portion supported by and extending from the handle assembly, the endoscopic portion includes: an outer tube having a diameter dimensioned for passage through the lumen of the cannula; a pair of jaws supported at a distal end of the outer tube, wherein the pair of jaws are movable between a fully open condition and approximated conditions, wherein when the pair of jaws are in the fully open condition the pair of jaws extend radially beyond an outer diameter of the outer tube to a dimension greater than the fixed diameter of the lumen of the cannula; and when the pair of jaws are in at least one approximated condition the pair of jaws have a transverse dimension at least less than the fixed diameter of the lumen of the cannula; a wedge plate slidably disposed within at least the endoscopic portion, the wedge plate defining a distal end, wherein the wedge plate is movable between: a distal-most position wherein the distal end of the wedge plate is interposed between the pair of jaws to maintain the pair of jaws in the fully open condition; and at least one proximal position wherein the distal end of the wedge plate is at least partially withdrawn from between the pair of jaws to permit the pair of jaws to be placed in at least a partially approximated condition; and a release mechanism connected to the wedge plate, wherein an actuation of the release mechanism withdraws the distal end of the wedge plate from between the pair of jaws; and wherein an actuation of the trigger withdraws the distal end of the wedge plate from between the pair of jaws.
 14. The surgical clip applier according to claim 13, wherein the release mechanism includes a biasing member for urging the wedge plate to the distal-most position.
 15. The surgical clip applier according to claim 14, wherein the biasing member is connected to at least the wedge plate.
 16. The surgical clip applier according to claim 13, wherein the release mechanism includes an inner tube slidably disposed within the outer tube, the inner tube including a distal end coupled to the wedge plate.
 17. The surgical clip applier according to claim 16, wherein a proximal end of the inner tube extends into the handle assembly, and wherein at least one release pin extends from the proximal end of the inner tube through a respective slot defined in the handle assembly.
 18. The surgical clip applier according to claim 13, wherein the wedge plate is in the distal-most position when the trigger is in an un-actuated condition.
 19. The surgical clip applier according to claim 13, wherein the wedge plate is in the distal-most position when the trigger and the release mechanism are both in an un-actuate condition.
 20. The surgical clip applier according to claim 13, wherein the wedge plate is at least partially withdrawn when the trigger is at least partially actuated. 